Pattern-chain.



PATENTED AUG. 4, 1903.

H. N. BOTTOMLBY.

PATTERN CHAIN.

APPLIOATION FILED MAB. a, 1903.

N0 MODEL.

F'IG.3.

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WITNESSES ms umnms mm 00, mo'm-wruo" wuulnoron. uv c UNITED STATESPatented August 4, 1903.

PATENT OFFICE.

PATTERN-CHAIN.

SPECIFICATION forming part of Letters .Patent No. 735,202 dated August4, 1903.

Application filed March 3, 1903. Serial No. 145,874. (No model.)

The object of my invention is to constructthe links of pattern-chainsemployed in what is known as the Dobcross loom (but which can also beadapted to other kinds of looms) so that the time occupied in changingthe pattern is reduced to a minimum. Hitherto in some instances thepattern-links have been formed of a spindle upon which are mounted anumber of rings or hoops suitable distances apart, according to theshafts required to be raised in forming the pattern. These hoops arekept in their proper positions bya further number of hoops of a lessdiameter, and in changing the pattern these hoops and rings take up alot of time in removing, adding, or adjusting the same for a freshpattern.

In the accompanying drawings similar letters refer to similar partsthroughout the several views.

Figure 1 is a plan view of part of my improved link for forming thepattern-chain employed in looms for weaving. Fig. 2 is a plan view ofthe retaining-bar of my improved link. Fig. 3 is a plan view of asection of the pattern-chain, showing my improved links or mechanism foroperating the shafts of the dobby. Fig. 4c is a side view of Fig. 3.Fig. 5 is a side view of the notched disk used in connection with myimproved pattern chain mechanism. Fig. 6 is a sectional end view of myimproved link and means for operating the shafts of the (lobby as shownat Fig. 3.

I construct my improved pattern-link in the form of a notched bar A, thenumber of notches B corresponding with the number of shafts in thedobby, and in place of the hoops or rings hitherto employed for liftingthe shafts I employ disks 0, having notches D corresponding in size andshape with the notches in the bar A. These notches D are formed upondiametrically opposite sides of said disks. When these disks 0 are inposition on the notched bar A, the neck E of the disk, formed by thenotches in the same, fits within the notch B of the bar. A secondorretaining bar F the same length as the notched bar A fits against thenotched side of the same within the outer notches in the disks and soholds such disks firmly in the required positions. 7

A perforation is provided at each end of both bars A and F, throughwhich passes a split pin or spring-cotter G and holds the said barsrigidly together.

The notched bar is provided at each end with a suitable neck H to fitthe cylinder and with suitable wings J for attachment to thepattern-chain K.

By this construction of pattern links or chain it is not necessary toremove the same when requiring to change the pattern. All that isrequired is to detach the second bar F by withdrawing the cotters G,when the disks can be easily and quickly removed or adjusted, asdesired. Upon replacing the bar F and cotters the pattern is again set,so effecting a great saving in time and labor in this kind of work. Myinvention in addition to operating the shafts of dobbies may be alsoemployed for lifting or changing the shuttle-boxes in drop-box looms.

"What I claim as the invention, and desire to secure by Letters Patent,is-

In a pattern-chain, the combination, with a notched bar provided withnecks and wings at its ends, of a series of disks having notches atopposite sides, the notches on one side being placed in engagement withthe notches of the said notched bar, a locking-bar which engages withthe other notches of the said disks, and means for securing the saidlocking-bar to the said notched bar.

HENRY NAYLOR BOTTOHLEY.

Witnesses:

ABM. REED, WILFRID B. GREENWOOD.

